Techniques for Communicating on an Uplink in a Shared Radio Frequency Spectrum Band

1. A method for wireless communication at a user equipment (UE), comprising: receiving, in a first downlink transmission time interval (TTI) of a scheduled transmission burst, over a shared radio frequency spectrum band, an indication of a downlink-uplink TTI configuration for the scheduled transmission burst, wherein the downlink-uplink TTI configuration indicates a first number of upcoming downlink TTIs to follow the first downlink TTI before a first downlink-uplink transition, the first number being relative to the first downlink TTI in which the UE receives the indication, and a second number of uplink TTIs to follow the first downlink-uplink transition in the scheduled transmission burst before a second downlink-uplink transition of the scheduled transmission burst; and determining, based at least in part on the second downlink-uplink transition indicated by the downlink-uplink TTI configuration, a timing of a next downlink TTI in the scheduled transmission burst relative to the first downlink TTI in which the UE receives the indication.

2. The method of claim 1 , further comprising: receiving, in each of at least one additional downlink TTI of the scheduled transmission burst, an additional indication of an additional downlink-uplink TTI configuration for a portion of the scheduled transmission burst following the additional downlink TTI.

3. The method of claim 1 , further comprising: receiving, in the first downlink TTI, at least one of: a second indication of a downlink TTI duration, a third indication of an uplink TTI duration, or a combination thereof.

4. The method of claim 1 , wherein the first downlink TTI comprises a downlink subframe and the downlink-uplink TTI configuration comprises a downlink-uplink subframe configuration.

5. An apparatus for wireless communication at a user equipment (UE), comprising: a processor, memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, in a first downlink transmission time interval (TTI) of a scheduled transmission burst, over a shared radio frequency spectrum band, an indication of a downlink-uplink TTI configuration for the scheduled transmission burst, wherein the downlink-uplink TTI configuration indicates a first number of upcoming downlink TTIs to follow the first downlink TTI before a first downlink-uplink transition, the first number being relative to the first downlink TTI in which the UE receives the indication, and a second number of uplink TTIs to follow the first downlink-uplink transition in the scheduled transmission burst before a second downlink-uplink transition of the scheduled transmission burst; and determine, based at least in part on the second downlink-uplink transition indicated by the downlink-uplink TTI configuration, a timing of a next downlink TTI in the scheduled transmission burst relative to the first downlink TTI in which the UE receives the indication.

6. The apparatus of claim 5 , wherein the instructions are further executable by the processor to cause the apparatus to: receive, in each of at least one additional downlink TTI of the scheduled transmission burst, an additional indication of an additional downlink-uplink TTI configuration for a portion of the scheduled transmission burst following the additional downlink TTI.

7. The apparatus of claim 5 , wherein the instructions are further executable by the processor to cause the apparatus to: receive, in the first downlink TTI, at least one of: a second indication of a downlink TTI duration, a third indication of an uplink TTI duration, or a combination thereof.

8. The apparatus of claim 5 , wherein the first downlink TTI comprises a downlink subframe and the downlink-uplink TTI configuration comprises a downlink-uplink subframe configuration.

9. An apparatus for wireless communication at a user equipment (UE), comprising: means for receiving, in a first downlink transmission time interval (TTI) of a scheduled transmission burst, over a shared radio frequency spectrum band, an indication of a downlink-uplink TTI configuration for the scheduled transmission burst, wherein the downlink-uplink TTI configuration indicates a first number of upcoming downlink TTIs to follow the first downlink TTI before a first downlink-uplink transition, the first number being relative to the first downlink TTI in which the UE receives the indication, and a second number of uplink TTIs to follow the first downlink-uplink transition in the scheduled transmission burst before a second downlink-uplink transition of the scheduled transmission burst; and means for determining, based at least in part on the second downlink-uplink transition indicated by the downlink-uplink TTI configuration, a timing of a next downlink TTI in the scheduled transmission burst relative to the first downlink TTI in which the UE receives the indication.

10. The apparatus of claim 9 , further comprising: means for receiving, in each of at least one additional downlink TTI of the scheduled transmission burst, an additional indication of an additional downlink-uplink TTI configuration for a portion of the scheduled transmission burst following the additional downlink TTI.

11. The apparatus of claim 9 , further comprising: means for receiving, in the first downlink TTI, at least one of: a second indication of a downlink TTI duration, a third indication of an uplink TTI duration, or a combination thereof.

12. The apparatus of claim 9 , wherein the first downlink TTI comprises a downlink subframe and the downlink-uplink TTI configuration comprises a downlink-uplink subframe configuration.

13. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: receive, in a first downlink transmission time interval (TTI) of a scheduled transmission burst, over a shared radio frequency spectrum band, an indication of a downlink-uplink TTI configuration for the scheduled transmission burst, wherein the downlink-uplink TTI configuration indicates a first number of upcoming downlink TTIs to follow the first downlink TTI before a first downlink-uplink transition, the first number being relative to the first downlink TTI in which the UE receives the indication, and a second number of uplink TTIs to follow the first downlink-uplink transition in the scheduled transmission burst before a second downlink-uplink transition of the scheduled transmission burst; and determine, based at least in part on the second downlink-uplink transition indicated by the downlink-uplink TTI configuration, a timing of a next downlink TTI in the scheduled transmission burst relative to the first downlink TTI in which the UE receives the indication.

14. The non-transitory computer-readable medium of claim 13 , wherein the instructions are further executable to: receive, in each of at least one additional downlink TTI of the scheduled transmission burst, an additional indication of an additional downlink-uplink TTI configuration for a portion of the scheduled transmission burst following the additional downlink TTI.

15. The non-transitory computer-readable medium of claim 13 , wherein the instructions are further executable to: receive, in the first downlink TTI, at least one of: a second indication of a downlink TTI duration, a third indication of an uplink TTI duration, or a combination thereof.

16. The non-transitory computer-readable medium of claim 13 , wherein the first downlink TTI comprises a downlink subframe and the downlink-uplink TTI configuration comprises a downlink-uplink subframe configuration.